Everyone has memorized exactly two ZIP codes: 90210 and whatever their own ZIP code is. We can thank a certain TV show set in Beverly Hills for that. Aside from that, general knowledge of these ...

Previously on You’ve Got Mail, we looked at a few services that were designed to speed up the mail at various points along the way. But these improvements were all taking place on the USPS’ side of ...

The humble ZIP Code shows up in all kinds of surprising places. Planet Money looks at how it was born, how it transformed the mail and talks to one researcher who argues that it's gone too far. The ...